Standard Science Primary 6 Interactions

Ravi conducted an experiment by releasing a toy car down a ramp. He repeated the experiment by changing the surface of the ramp. Which variable must he keep the same to ensure a fair test?

A The amount of friction
B The type of surface on the ramp
C The angle of the ramp
D The time taken for the car to reach the bottom
Show Worked Solution

Worked Solution

Step 1: Identify the aim (testing surface vs friction). Step 2: The surface is the changed variable. Step 3: All other variables, like the ramp angle and the car used, must be constant.

Correct answer: The angle of the ramp

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